+2.7V to +5.25V, Low-Power, 4-Channel,

Serial 10-Bit ADCs in QSOP-16

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3

Multiplexer Leakage Current

pF

15

DIN, SCLK, CS Input Capacitance

µA

±0.01

±1

DIN, SCLK, CS Input Leakage

V

0.2

DIN, SCLK, CS Input Hysteresis

V

0.8

DIN, SCLK, CS Input Low Voltage

2.0

µA

0.01

10

Shutdown VREF Input Current

k

Ω

18

25

VREF Input Resistance

µA

100

150

VREF Input Current

V

1.0

50mV

VREF Input Voltage Range

(Note 9)

pF

16

Input Capacitance

0 to VREF

V

±VREF / 2

Input Voltage Range, Single-

Ended and Differential (Note 6)

µA

±0.01

±1

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

(Note 10)

Unipolar, COM = 0V

VREF = 2.500V

Bipolar, COM = VREF / 2

CONDITIONS

µA

±4.0

SHDN Input Current

V

0.4

SHDN Input Low Voltage

V

SHDN Input High Voltage

ELECTRICAL CHARACTERISTICS (continued)

unless otherwise noted.)

V

3.0

DIN, SCLK, CS Input High Voltage

V

2.470

2.500

2.530

VREF Output Voltage

mA

30

VREF Short-Circuit Current

ppm/°C

±30

VREF Temperature Coefficient

MAX1248

µF

0

Capacitive Bypass at VREF

Internal compensation mode

4.7

External compensation mode

mV

0.35

Load Regulation (Note 8)

0mA to 0.2mA output load

µF

0.01

Capacitive Bypass at REFADJ

±1.5

REFADJ Adjustment Range

%

V

0.5

REFADJ Buffer-Disable Threshold

Capacitive Bypass at VREF

Internal compensation mode

0

µF

External compensation mode

4.7

Reference-Buffer Gain

MAX1248

2.06

V/V

MAX1249

2.00

REFADJ Input Current

MAX1248

±50

µA

MAX1249

±10

V

1.1

SHDN Input Mid Voltage

ANALOG/COM INPUTS

EXTERNAL REFERENCE AT VREF (Buffer disabled)

DIGITAL INPUTS (DIN, SCLK, CS, SHDN)

EXTERNAL REFERENCE AT REFADJ

INTERNAL REFERENCE (MAX1248 only, reference buffer enabled)